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InsTAllATIon - eleCTrICAl ConneCTIons
eleCTrICAl ConneCTIons
WARNING
1. Disconnect power supply before making wiring
connections to prevent electrical shock and equipment
damage.
2. All appliances must be wired strictly in accordance with
wiring diagram furnished with the appliance. Any wiring
different from the wiring diagram could result in a hazard
to persons and property.
3. Any original factory wiring that requires replacement must
be replaced with wiring material having a temperature
rating of at least 105°C.
4. Ensure that the supply voltage to the appliance, as
indicated on the serial plate, is not 5% greater than rated
voltage.
CAUTION
Ensure that the supply voltage to the appliance, as indicated
on the serial plate, is not 5% less than the rated voltage.
Table 12.1 - Propeller unit model PTs operating electrical data ➀
Supply
Power Code
Voltage
115V
01 (115V)
1 Phase
01 (115V) with
208V
1 Phase
Transformer
230V
01 (115V) with
1 Phase
Transformer
01 (115V) with
208V
3 Phase
Transformer
01 (115V) with
230V
3 Phase
Transformer
01 (115V) with
460V
3 Phase
Transformer
575V
01 (115V) with
3 Phase
Transformer
Table 12.2 - Blower model BTs motor Amp draw ➀ ➁
Motor HP
115V/1ph
230V/1ph
1/4
5.4
1/3
5.0
1/2
8.5
1
13.4
1-1/2
15.4
2
-
3
-
5
-
Table 12.3 - Blower model BTs Control Circuit Amp draw ➀ ➁
Model Size
115V/1ph
230V/1ph
150-250
2.2
300-400
1.3
12
150
175
Motor Amps
2.8
2.8
Total Amps
5.0
5.0
Transformer kVA
1.0
1.0
208V Total Amps
2.76
2.76
Transformer kVA
0.75
0.75
230V Total Amps
2.50
2.50
Transformer kVA
1.0
1.0
208V Total Amps
2.76
2.76
Transformer kVA
0.75
0.75
230V Total Amps
2.50
2.50
Transformer kVA
0.75
0.75
460V Total Amps
1.25
1.25
Transformer kVA
0.75
0.75
575V Total Amps
1.00
1.00
Supply Voltage
208V/3ph
230V/3ph
-
-
-
2.5
1.9
1.6
3.8
2.3
2.6
6.7
4.0
3.8
7.7
5.2
5.2
-
6.8
6.6
-
10.6
-
-
14.3
13.2
Supply Voltage
208V/3ph
230V/3ph
1.1
1.2
1.1
0.7
0.7
0.7
1. Installation of wiring must conform with local building codes, or in the
absence of local codes, with the National Electric Code ANSI/NFPA 70
- Latest Edition. Unit must be electrically grounded in conformance to
this code. In Canada, wiring must comply with CSA C22.1, Part 1,
Electrical Code.
2. Two copies of the unit wiring diagram are provided with each unit. One
is located in the side access control compartment and the other is
supplied in the literature packet. Refer to this diagram for all wiring
connections.
3. Make sure all multi-voltage components (motors, transformers, etc.)
are wired in accordance with the power supply voltage.
4. The power supply to the unit must be protected with a fused or circuit
breaker switch.
5. The power supply must be within 5 percent of the voltage rating and
each phase must be balanced within 2 percent of each other. If not,
advise the utility company.
6. External electrical service connections that must be installed include:
a. Supply power connection (115, 208, 230, 460, or 575 volts).
b. Connection of thermostats, or any other accessory control devices
that may be supplied (24 volts).
noTe: All units with supply voltage 208V and greater must use a field
installed step-down transformer, available as a separate accessory.
Refer to Tables 12.1 through 12.4 for additional information on the
required transformer.
7. Refer to Figure 20.1 for the side access control compartment location.
8. All supply power electrical connections are made in the side access
control compartment of the unit. The low voltage (thermostat and
accessory control devices) can be wired to the terminals in the side
access control compartment. Refer to the wiring diagram for the
terminal location of all low voltage wiring.
Model PTS Sizes
200
250
300
350
400
2.8
5.4
7.5
7.5
8.8
5.0
7.6
8.8
8.8
10.1
1.0
1.0
1.5
1.5
1.5
2.76
4.20
4.87
4.87
5.58
0.75
1.0
1.5
1.5
1.5
2.50
3.80
4.40
4.40
5.05
1.0
1.0
1.5
1.5
1.5
2.76
4.20
4.87
4.87
5.58
0.75
1.0
1.5
1.5
1.5
2.50
3.80
4.40
4.40
5.05
0.75
1.0
1.5
1.5
1.5
1.25
1.90
2.20
2.20
2.53
0.75
1.0
1.5
1.5
1.5
1.00
1.52
1.76
1.76
2.02
Table 12.4 - Blower model BTs
Accessory Transformer size (kvA) ➂
460V/3ph
575V/3ph
-
-
0.8
0.6
1.3
0.9
1.9
1.5
2.6
1.9
3.3
2.3
-
4.0
➀
Amp draw data shown is operating amp draw at incoming
power. For units that use a field installed accessory step-down
6.6
5.2
transformer as noted, the amp draw shown is the primary side
operating amp draw. For sizing of circuit protection for equipment
with transformers, please refer to the National Electric Code.
➁
For BTS models, add the Motor Amp Draw and Control Circuit
Amp Draw to get the Total Unit Amp Draw.
460V/3ph
575V/3ph
➂
Transformers for blower models are typically smaller than those
used for propeller models, as the transformer is not needed for
0.6
0.4
the blower motor. Size 300-400 use a PSC power exhauster
0.3
0.3
motor, further reducing the required transformer size.
6-561
➀
Amp draw data shown is operating amp draw at
incoming power. For units that use a field installed
accessory step-down transformer as noted, the amp
draw shown is the primary side operating amp draw.
For sizing of circuit protection for equipment with
transformers, please refer to the National Electric
Code.
Supply Voltage
208V
230V
Model Size
3 ph
1 or 3 ph
150-250
0.5
0.5
300-400
0.5
0.25
460V
575V
3 ph
3 ph
0.5
0.5
0.25
0.25
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